Process of making formed pulp vessels.



No. 867,389. PATENTED OCT. 1, 1907.

' w. A; LORENZ.

PROCESS OF MAKING FORMED PULP VESSELS.

Al rmoumn FILED FEB. 25. 1901.

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1 s Inventor UNITED STATES PATENT err-"Ion.

WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUTJASSIGNOR OIWONE-HALF 'lO JOSEPH MERRITT, OF HARTFORD, CONNECTICUT.

I PROCESS MAKING FORMED PULP VESSELS.

Specification of Letters Patent.

Patented Oct. 1, 1907.

Application filed February 25,1907. Serial No. 359,071.

To all 'ivhom it may concern:

Be it known that I, WILLIAM A.-LoRnNz, a citizen of the United States, and a resident of Hartford, in the My process comprises the making of a formed double layer pulp vessel from two grades of pulp tuff. The process consists'in dippinga primary or degessed pervious mold form into a primary vat containing one grade pulp-stuff and depositing a layer of pulp thereon; and dipping a secondary or correspondingly raised pervious mold-form intoja secondary vat containing another grade of pulpstuff, and depositing a layer of pulpthereon; then removing both mold iorms from the vats, and bringing the two mold-forms with the depositedlayers together, thereby nesting the layers and uniting them into a single vessel composed of two grades of pulp. This double layer pulp vessel may become pressed if desired, and then dried.

In carrying out this process I employ a depressed and a correspondingly raised mold-form of the desired shape, and carry both of these mold-forms upon a suitable rotating device, by which the two mold-iorms-are carried into and out from two different'vats, each mold form entering and passing from its'own vat, each vat con- .taining the desired grade of pulp. When dipping into the pulp, exhausting apparatus in the interior of the molds draws the water through themold forms and out of the machine, whereby the desired layer of pulp is .deposited upon each mold-form. Then bothmoldforms are rotated from the vats, and when the desired amount of water has been drained, by means of the exhaust apparatus from both layers of pulp uppn. the

molds, both of the mold-Terms are brought together,

whereby the two layers are nested, one layer being transferred upon the other layer. The two mold forms may be pressed together, so as to more firmly unite the two layers. Then the two mold-forms are separated, and the two-layer vessel is detached from one of the fdrms by means of a blast of air, the vessel remaining upon the other form. Then the .vessel is removed from the other mold-form, preferably by a blast-of air, and.

delivered to suitable taking-o3 apparatus. In the drawings I have shown apparatus embodying the features just described. I may however, employ other means to form the two-layer vessel, comprising a primary and a secondary mold-form, each carried upon separate rotating devices, instead of upon' one rotating device; in such apparatus each mold-form dips into its own vat containing the desired grade of pulp, and a layer of pulp is deposited. upon each form. Then by rotating each separate device or mold-carrier from each vat, the two mold-forms are then rotated opposite to one another and brought together, when one layer from one mold-form is deposited upon the other layer in the other mold-form. An air blast may be employed to effect this transferring and uniting, or pressure may be employed .by nesting the two mold forms closely together. Then the vessel composed of the two layers may be removed by a blast or other suitable means.

In the drawings, Figure 1 represents a sectional view of an apparatus for carrying out my improved process,

comprising a fixed-shaft, upon which is placed the retating carrier, carrying two mold-forms dipping into two separate vats. Fig.2 represents a sectional view of the two mold-forms removed from the vats, and about to be brought together. Fig. 3 represents a sectional view, showing the two mold-forms brought fully together. Fig. 4 shows the two mold-forms separated, with the two-layer pulp vessel united, transferred and held upon one of the mold-forms. Figs. 5 and 6 represent, respectively, an inside view, and a sectional view of the twolayer pulp vessel V, in which 8represents the outer layer, and 9 the inner layer of the vessel. v

In the drawings, 10 represents a pulp vat containing one gradeof pulp, which may be coarse, and which may form the outer layer of thevessel.

11 represents a separate pulp vat containing another grade of pulp, which may be of a finer grade, and which may form the inner layer of the vessel.

, 12 represents a fixed shaft having a hollow portion or opening 13 communicating with an exhaust pump not shown, and also having a hollow portion or opening 14 communicating with air compressing apparatus, not

shown. Upon the shaft 12 is placed the rotating mold carrier 15 having a hub 16. This carrier is provided with a hollow portion or chamber 17, communicating with the duct 18. This duct 18.during the exhausting position communicates with anaperture 19 in the shaft12 p The moldcarrier 15 carries the primary or depressed mold-form 20, which is provided with apertures communicating with the chamber 17 of the carrier. This mold-form'is .also covered with suitable wire gauze, shown in dotted lines upon the mold-form 20.. The carrier 15 and the mold-form 20 in its rotation, 'dip into the primary vat'lO, and out therefrom. During this dipping operation, a suitable pump exhausts the I air from the interior 13 of the shaft 12, through the aperture 19, duct 1 and chamber 17, by which water is pumped through the pervious mold, and pulp-stuff fromfthe vat f10 isideposited upon the mold-form,'

shown in thickened dots at'21. 1

To the'hub '16 is attached a bracket 23 carrying an 2 I biases oscillating secondary mold carrier '24, having a raised will be extracted from. both layers of pulp during the -operation of bringing the two mold-forms together.

. ner layer of the vessel, the latter being but'a fraction mold-form ate a secondaryvat' containing another grade of pulp=stuif ,and depositing a layer of pulp thereon; 'r epervious mold-form 25 This oscillating mold carrierof the thickness of the whole vessel. In this manner 24' is pivoted atc26 in the bracket 23,. and is provided I produce a vessel having a fine appearance upon that with a spring -27 ior holding the -carrier 24 against a side which is used, and at the same. time I produce an 5 fixed track 28. This trackis'so shaped as to close and article which is cheaper in cost than one made entirely open the secondary'moldoarrier during its rotation, of a fine grade of pulp. I may also add to one or the thespring holding the-carrier against the track. The other of the pulp vats, as desired, a binder or size, carrier 24 is also provided with a chamber 29, a duct 30 which will make one of the layers waterproof, so as communicating with an aperture 31, which during the to resist the absorption of moisture when moist sub- 10 dipping operation communicates with the aperture stances are placed in the vessel.

and the hollow portion 13 of the I What I claim:-

Theraised mold-form 25 is provided with suitable i T pr c f snak a form y n p 5 apertures and r uz in Older to permit the vessel fi om two grades of pulp-stud, consisting of dipping Ba 6 f at hth d 1d y d a depressed pervious mold-form into a primary vat; cong sel'jon my m0 taining one grade of fiilp-stufi, and depositing a layer of 15 through its various aperturesout thro gh he shaft pulp thereon; dipping a correspondingly raised pervious During the dippirig 'oper'ationaolayer of pulp will be moldform into a secondary vat containing another grade deposited upon the mold form 25as shown in thickof pulp'stufi and depositing a layer of Pulp thereon? eneddots at 22, r moving both mold-forms from the vats, and bringing the v I two mold-forms with the deposited layers together, there- I lo m h two mold canler5 out of the Y by nesting'the layers, and uniting themlnto a single ves- 20 from a lower position to an upper pos tion each moldsel composed of two grades of pulp.

dform will earrythe desired amount of pulp-stuff upon The Pwcess of making firmed double Y? Pulp its face according to the Strength of the exhaust vessel from two grades of pulp-stuff, consisting of dipping adepressed pervious mold-form into a primary vat conthe thicknesspf thepu1pg the dlppmg P taining one grade of pulprstufl, and depositing a layer of oration. During its passage upwardly, more water pulp thereon; dipping a correspondingly raised-pervious 30 1 0 fcarr-ier 15 at the require dltime. Then the mold carrier;

carrier through the aperture 34 on the-sbaft12. When moving both mold-forms from the vats, and bringing the two mold-forms with the deposited layers together, thereby nesting the layers, and uniting them by transferring one layer upon the other and thus forming a slngle'vessei composed of, two grades of pulp.

3. The-process of making a formed double layer pulp yessel-frbm two grades 01! pulp-stuff, consisting of dipping a depressed pervious mold-form into a primary vat containlng one grade of pulp-stuir, and depositing a layer of pulp thereon; dipping a correspondingly raised pervlous mold-form-into a secondary vat containing another'grade 0t pulp-stud? and depositinga layer of pulp thereon; removing both mold-forms from'the vats, and-bringing the ;two mold-forms with the deposited layers together, thereby nesting the layers,fand uniting them by pressure into a slngle vessel composed of two grades of pnlp V 4.--The process ofmaking a formed double layer pulp vessel from two grades of, pulp-stuff, consisting of dipping ',a depressed pervious mold-form into a primary vat containing one grade of pulp-stuff, and depositing a layer of pulp thereon; dipping a correspondingly raised pervious mold-form into a secondary vat containing another grade 1- Fig. 2 represents these two m old-forms brought nearly together, fire exhaust stillbeing. connected to both forms. Fig. 3 represents both mold-forms brought 30 entirely together, the exhaust'beingcut'oi'i from both mold-forms. hes e 'two'forms may be held together I io r 'ashort whi le,"d ii.1 'ing which time both layers will be unitedby compression, forming the two-layer vessel Y.

' In Fig. 4: It'have sh0wn-the secondary mold carrier 35- 24 and raised"mold-foi'rir25 in dot and dash lines, and

removed a little from'tlie depressed mold-form 20. 111' this position the two-layer vessel V is shown carried by ,theniold-iorm 25 having been detached from the mold -f orm:20 by a blast oi air from theinterior ofthe- .24 is'moved to its outward position, shown in iulllines in Fig. 4; from thisposition the vessel V be re moved .by'a blast oi air from the'interior oi themold' sent a variegated appearance, and afiner grade of; pulp -presenting a better appearance may be used'f or the in- EDWARD H. Lonnriz,"

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,l of pulp-stuff and depositing a layer ofpulp thereon re- 45 removed by the blast t may be taken by any suitable moving both mold-forms from the vats, and bringing the transferring means not two mold-forms With the GEPOSltQd layers together, therei a by nesting the layers, and uniting them into a single vesj I so], and drying the, completed article.

-m n ftll ao-lay P p Y y Signed at Hartford, Conn.) this 21st day of February, athe process described, l' am 'enabledtoemploy two '1907. 50 grades. of pulp; A' coarser or cheaper grade may be 'WILLIAM A. LORENZ.

. used for the outer layer'of the vessel, which may pre- Withesses. i 

